Improvement in stop mechanisms for looms



T. I'SHERWGUD SLW. NUTTALL.

Siep-Mechanism for Looms.

iNo. 138,893, Patented May 13,1873.

UNITED STATES PATENT FFI IMPROVEMENT IN STOP MECHANISMS FOR LOOMS.

Specification forming part of Letters Patent No. 138,893, dated May 13,1873 application filed April 5, 1873.

To all whom it may concern:

Be it known that we, THOMAS IsHEEwooD and WILLIAM N UTTALL, of Westerly,in the county of Washington and State of Rhode Island, have invented anew and Improved Weft Stop-Motion, of which the following is aspecification Our invention consists of two or more wires, with devicesfor presenting themi behind the weft-thread at the middle of the lathe,or thereabout, after the shuttle passes, to insure the action of theweft-fork or feeler for throwing off the shipper-lever when the weft ispresent. It also consists of a novel arrangement of means for presentingthe feeler to the weft in a suitable position in advance of the cloth,and then movingit away, so as not to interfere with the beating up ofthe weft by the reed. The arrangement of the stopping mechanism at themiddle of the lay saves the necessity of employing one near each edge ofthe warp, and it is better, because, in the latter arrangement, an endof broken weft extending to the middle of the warps, or beyond, willoften raise the latch of the weft-fork and prevent the stopping of theloom. It often happens in looms carrying several shuttles that thewei'ts break, so that the ends are long enough to raise the latches,Vowing to the cutting or overstraining of them in particular places bythe boxes in which the shuttles are changed.

Figure 1 is a sectional elevation of a loom provided with our improvedweft-stop motion. Fig. 2 is a front elevation, with a part of the frontbeam broken out. Fig. 3 shows the catch of the belt-shipper lever.

Similar letters of reference indicate corresponding parts.

A A represent two wires or small rods projecting upward through the beamB of the lathe from the free end of a rock-lever, C, pivoted at D on abraeket,E, projecting downward and forward from the lathe-beam, andcarrying at its other end a friction -roller, F, which works in acam-slot, G, of a plate, H,

attached to the under side of the front beam time to pass the notch L ofthe lever N, or

until the lathe goes back. The latch and the feeler are pivoted on theend of the rock-lever O, on the shaft P, which has a long arm or crank,Q, operated by the cam It, on the main shaft S, which is so shaped thatthe feeler is carried back between the warps in front of the layimmediately after the shuttle passes, and sufficiently far to be struck`by the weft and pressed back by it until the latch has passed the notchL, but withdraws it in time to be out of the way of the reed at the beatup. When the weft is broken, the latch falls into the notch L, so thatcam B throws lever N back by means of arm Q and rockdever O, and lever Nthrows the shipper lever T out of notch n by the arm V, on the end ofshaft P1, rock-lever W, and the pin w. A

It is immaterial whether the wires A be arranged under the lathe-beam,together with their actuating devices, or above, for they can bearranged above it as well, as shown in dotted lines A1, the rock-leverbeing arranged on the upper part of the lathe, say the beam A2 andthecam-plate H, lnounted on any suitable standard rising up from theloom-frame. By preference it, and the rock-lever C, would be arranged atone side of the loom, while the rod B1, projecting from the free end ofthe rock-lever, would extend along the lathe to the middle orthereabout.

In practice we propose to have the levers N and O so attached to theshafts P and P1, or blocks Q thereon, that they can be readily removedby removing a pin, Q2, to facilitate the removal of the cloth from theclothroll.

Having thus described our invention, we claim as new and desire tosecure by Letters Patentl. The combination with the lathe of the wires Aand mechanism substantially as described, for presenting them behind theweft and withdrawing them in the manner set forth.

2. rIhe combination of the rock-lever O, arm Q, cam R, and feeler andlatch with the lever N, for operating the shipper-lever, all arranged tooperate in the manner described.

3. The combination of the wires A, arranged and operating with the layas described, and the feeler and latch as set forth.

THOMAS ISHERWOOD. WILLIAM NUTTALL. Witnesses:

T. B. MosHER. ALEX. F. RoBERTs.

